State | CASSCF/cc-pVTZa | MRCI+Q/cc-pVTZb | MCQDPTc | Electron configuration |
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0.0 | 0.0 | 0.0 |
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0.30 | 0.29 | 0.40 |
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0.44 | 0.46 | 0.46 |
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2.10 | 2.20 |
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2.16 | 2.29 |
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2.17 | 2.35 |
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2.42 | 2.50 |
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3.61 | 3.22 |
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3.44 | 3.80 |
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4.70 | 4.53 |
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4.54 | 4.78 |
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4.67 | 4.92 |
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4.77 | 5.02 |
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5.77 | 5.63 |
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6.01 | 6.34 |
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a E(CASSCF/cc-pVTZ) = -402.4642666 ![]() ![]() c (MCQDPT/aug-cc-pVDZ) (Rintelman et al. 2001). |